org.apache.activemq.broker.region.TempQueue Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.broker.region;
import java.io.IOException;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.region.cursors.VMPendingMessageCursor;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQTempDestination;
import org.apache.activemq.store.MessageStore;
import org.apache.activemq.thread.TaskRunnerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The Queue is a List of MessageEntry objects that are dispatched to matching
* subscriptions.
*
*
*/
public class TempQueue extends Queue{
private static final Logger LOG = LoggerFactory.getLogger(TempQueue.class);
private final ActiveMQTempDestination tempDest;
/**
* @param brokerService
* @param destination
* @param store
* @param parentStats
* @param taskFactory
* @throws Exception
*/
public TempQueue(BrokerService brokerService,
ActiveMQDestination destination, MessageStore store,
DestinationStatistics parentStats, TaskRunnerFactory taskFactory)
throws Exception {
super(brokerService, destination, store, parentStats, taskFactory);
this.tempDest = (ActiveMQTempDestination) destination;
}
@Override
public void initialize() throws Exception {
this.messages=new VMPendingMessageCursor(false);
this.messages.setMemoryUsageHighWaterMark(getCursorMemoryHighWaterMark());
this.systemUsage = brokerService.getSystemUsage();
memoryUsage.setParent(systemUsage.getMemoryUsage());
this.taskRunner = taskFactory.createTaskRunner(this, "TempQueue: " + destination.getPhysicalName());
}
@Override
public void addSubscription(ConnectionContext context, Subscription sub) throws Exception {
// Only consumers on the same connection can consume from
// the temporary destination
// However, we could have failed over - and we do this
// check client side anyways ....
if (!context.isFaultTolerant()
&& (!context.isNetworkConnection() && !tempDest
.getConnectionId().equals(
sub.getConsumerInfo().getConsumerId()
.getConnectionId()))) {
tempDest.setConnectionId(sub.getConsumerInfo().getConsumerId().getConnectionId());
LOG.debug("changed ownership of {} to {}", this, tempDest.getConnectionId());
}
super.addSubscription(context, sub);
}
@Override
public void dispose(ConnectionContext context) throws IOException {
if (this.destinationStatistics.getMessages().getCount() > 0) {
LOG.info("{} on dispose, purge of {} pending messages: {}",
getActiveMQDestination().getQualifiedName(),
this.destinationStatistics.getMessages().getCount(),
messages);
// we may want to capture these message ids in an advisory
}
try {
purge();
} catch (Exception e) {
LOG.warn("Caught an exception purging Queue: {}", destination, e);
}
super.dispose(context);
}
}